19720870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{5231}}^1$

素因数の和:5280

約数の個数: 32

約数和(自身を含む): 39553920

約数和(自身を除く): 19833050

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 130, 145, 290, 377, 754, 1885, 3770, 5231, 10462, 26155, 52310, 68003, 136006, 151699, 303398, 340015, 680030, 758495, 1516990, 1972087, 3944174, 9860435, 19720870]

約数ペア:

[(1, 19720870), (2, 9860435), (5, 3944174), (10, 1972087), (13, 1516990), (26, 758495), (29, 680030), (58, 340015), (65, 303398), (130, 151699), (145, 136006), (290, 68003), (377, 52310), (754, 26155), (1885, 10462), (3770, 5231)]